Pakistan Journal of Biological Sciences1028-88801812-5735orgz10.3923/pjbs.2007.3734.3737Majid LotfalianZahra NouriYahya KoochMahmoud Zobeiri1220071020Zarbin (Cupressus sempervirence var. horizontalis) with its unique characteristics is one of the worthiest species which can be found in the central area of Alborz in the North of Iran. Especially in the Roodbar-manjil area, Chaloos-Hassanabad valley as well as it extends from Zarringol area to Gorgan. Although the distribution areas of this species have been protected, these forests have been invaded by the villagers who use this useful wood. For this reason in the Roodbar area, trees with DBH>30 cm are extremely rare. To recognize and to be aware of the stand quantity, the current research tries to calculate the species volume table in Roodbar area, to be the basis for any calculation of the volume of stand in the region. For this purpose, trees have been sampled using the line sampling method. After estimating the form factor, Tarif table have been prepared. In this study, a new method for measuring tree height is presented, in which, instead of measuring slope distance from observer to tree (which is difficult in young conifers because of existence branches in lower height) distance between the eye level of observer to tree butt is measured. Which doing of it is easier, time of field work is decreased and accuracy of measurement and calculation is increased.]]>1Asli, A., D. Bargole and M. Zobeiry,2000Fagus orientalis) in patum and Namkhane districts of Kheirood-Kenar forests (North of Iran).]]>Iran. J. Nat. Resour.,255261 (In Persian)2Ekhlasi, G.,2000Studying Tarif of Guilan forests (North of Iran) and comparing it to volume table prepared by forestry organization.20003Heidari, R.,1995Fagus orientalis) and in patum and Namkhane districts of Kheirood-Kenar forests (North of Iran).]]>Studying form factor in beech (Fagus orientalis) and in patum and Namkhane districts of Kheirood-Kenar forests (North of Iran).19954Leech, J.W., R.L. Corell and A. Kyaw Myient,1991For. Ecol. Manage.,402792885Aleixo da Silva, J.A., M.R.C.S. De Melo and B.E. Borders,1993For. Ecol. Manage.,581291366Matis, G.,2000Abies borsii Regis.]]>For. Ecol. Manage.,2573777Pashayee, B.,2006Carpinus betulus) in Konesrood forests (North of Iran).]]>Investigation precision of volume table (Tarif) for Hornbeam species (Carpinus betulus) in Konesrood forests (North of Iran).20068Pohjonen, V.,2001Juniperus procera Hocht-ex. Endi.]]>For. Ecol. Manage.,441852019Poorbeik, H.,2000Pinus sylvestris (North of Iran).]]>Iran. J. Nat. Resour.,304251, (In Persian)10Sadeghian, J.,2002Carpinus betulus) in different methods in Mazandaran forest (North of Iran).]]>Studying form factor in Hornbeam (Carpinus betulus) in different methods in Mazandaran forest (North of Iran).200211Taheri, F.,1994Studying the most suitable form and area of sampling plot in regeneration area.199412Wiant, H.V., G.B. Wood and T.G. Gregorie,2002For. Ecol. Manage.,4933333913Zobeiry, M.,2004Forest Inventory (Measurement of Tree and Stand).pp: 402, (In Persian)pp: 402, (In Persian)14Zobeiry, M.,2005Fagus oreintalis) in patum and Namkhane districts of Kheirood-Kenar forests (North of Iran).]]>Iran. J. Nat. Resour.,446678 (In Persian)15Zobeiry, M.,2006Forest Biometry.pp: 411pp: 411